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No. 626,053. Patented May 30, I899. J. A. CHARTER & F. a. HOBART.

COMPRESSOR. A umxbn filed 1m 1a, 1898.)

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(No Modal.)

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No. 626,053. Patented May 30; I899. .1. A. cmun'sn & r. s. HOBART.

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COMPRESSOR.

(Application filed on. 13, 1898.)

(No Model.)

I u 4 7 Y\\\\\\\\\\\\\\\\\\\\\\\\\ .4 t \\\\\\\\\\h s\\\\\\\\\\\\\\\NITED STATES PATENT OFFICE.

JAMES A. CHARTER, OE CI-IICACO, ILLINOIS, AND FRANK G. HOBART, orBELOII, WISCONSIN, AssICNoRS TO THE FAIRBANKS, MORSE & COMPANY, OECHICAGO, ILLINOIS. l

COMPRESSOR.

SPECIFICATION forming part of Letters Patent o. 626,053, dated May 30,1899.

Application filed October 13, 1898.

To all whom, it Inn/y concern.-

Be it known that we, JAMES A. CHART R,

of Chicago, Cook county, Illinois, and FRANK fied which will be simpleand economical in construction, positive and reliable in its operation,and more compactly arranged than most of the compressors of like kindnow in common use.

In order to accomplish the above as well as other objects, which willhereinafter appear, we provide a bed or frame having a powercylindermounted upon one end and a compression-cylinder mounted upon the otherend thereof and a crank-shaft carried by bearing-blocks arrangedintermediate said cylinders. Within the power-cylinder is arranged atrunk-piston of considerable length, one end of which projects out ofsuch cylinder in the direction of the compression-cyliuderand issupported by guideways, as and for the purpose which will hereinafter bemore particularly described. Between the power and compression cylinderswe provide a yoke-androd connection having opposite rods arranged onopposite sides of the crank-shaft, so that the strain or forcetransmitted from one cylinder to the other will be carried along astraight line and not produce any side stresses, such as would result inuneven wear of the cylinders and pistons.

In order to secure as compact an arrangement of the parts as possible,We place the two cylinders but a short distance apart, and in theinwardly-projecting end of the compression-cylinder we provide anarrangement of slots which form clearance-ways for the yoke and permitthe full length of Stroke re- Serial No. 693,436. No man.)

quired, while at the same time affording an efficient guide for thecompressing-piston.

Our'invention will now be better understood by reference to theaccompanying drawings, in which we have illustrated it in preferredform, and in which- Figure 1 is a side elevation showing our improvedcom pressor. Fig. 2 is a plan view of the same, partly in section. Fig.8 is a section showing the arrangement of the guideways which supportthe projecting end of the power-piston, and Fig. 4 is a section showingthe arrangement of the yoke and the slots in the compression-cylinderwhich form clearance-ways for the yoke.

In the practice of our invention we provide, first, a bed or frame 1,upon one end of which is mounted a power-cylinder (in this case agas-engine cylinder) 2 and upon the other end of which is mounted acompression-cylinder.

3. Between the two cylinders are bearingblocks or journals at, whichcarry the crankshaft 5. In order to support the projecting end of thepower-piston 6 and take the weight off the cylinder, so as to preventuneven wear of the latter, we provide a pair of guideways 7, arranged asshown in Fig. 3 and indicated in dotted lines in Fig. 1, these guidewayscarryinga combined cross-head and yoke-casting 8, attached to thepiston. .Within the compression-cylinder is a piston 9, to theprojecting end of which is secured another yokecasting 10, and .withinthe inwardly-project'- ing extension of the compression-cylinder areformed a pair of slots 11, arranged so as to make a clearance-way forthe yoke and permit the latter to move past the end of the cylinder,these provisions all permitting a full length of stroke with acomparatively short length of the machine as a Whole.

AS will be clearly seen from an examination of Figs. 3 and 4:, the rodor yoke connections 12 are arranged in a plane at an angle abouthalf-way between the vertical and horizontal,

so as to pass one above and the other below the crank-shaft, and yettransmit the strains and power from one piston to the other in a directline without any side strain or bending moment, such as would result inan uneven wearof the cylinders and pistons as well as a certain loss inthe percentage of powen Our invention may be used on compressorsactuated by hydrocarbon or explosive engine cylinders, and it is inconnection with such a power-cylinder that we have illustrated anddescribed it herein; but we do not desire to limit our claims to thisparticular class of power apparatus, and it is obvious that theadvantages of our improvement are applicable also to compressorsoperated by other motive fluids.

' Having thus described our invention, what we claim as new, and desireto secure by Letters Patent, is

1. An improvement in compressors comprising the combination with a bedor frame, a power-cylinder and a compression-cylinder mounted thereon, apower-piston and a compression-piston operating in said cylinders, and ayoke connection between said pistons, a crankeshaft mounted between saidcylinders, said yoke connection comprising rods arranged on oppositesides of said shaft and also on opposite sides of said crank; of slotsin the inwardlyprojecting end of said compression-cylinder,said slotsformingclearanco or guide ways for said yoke and being arranged inposition on a diagonal plane corresponding to the plane of the rods ofthe yoke, substantially as described.

2. An improvement in compressors comprising the combination with a bedor frame, a power-cylinder and a compression-cylinder mounted thereon, apower-piston and a compression-piston operating in said cylinders, and ayoke connection between said pistons, of slots in theinwardly-projecting end of said compression-cylinder,said slots formingclearance or guide ways for said yoke.

JAMES A. CHARTER. FRANK G. HOBART.

Vitn esses:

B. P. ELDRED, F. L. BUsH.

